Means for introducing gas into a liquid



My11,1934. s. A. ESKILSQN 1,966,854-

MEANS FOR INTRODUCING GAS INTO A LIQUID Filed Oct. 14, 1931 Patented July 17, 1934 PATENT- OFFICE MEANS FOR INTRODUCING GAS INTO A moon) Sven August Eskilson, Stockholm; Sweden, as- 'signor to Svenska Aktiebolaget'Gasaccumulater; Stockholm, Sweden -Application October 14, 1931,-Serial No. 568,849

I In Sweden November 29, 1930 r Claims.

1o drinks it has been found that the introduction of carbonic acid into the liquid is performed more easily and quickly by introducing small quantities of carbonic acid intermittently until the required amount of carbonic acid has been '15 introduced. This has been done hitherto by opening and closing a cook or valve by hand in the piping which leads carbonic acid to the liquid receiver. This operation, however, is troublesome and time-wasting, and moreover go the carbonic acid is introduced in difierent quantities, because it is not possible tokeep the valve byhand opened or closed uniformly.

The present invention has for object to obviate this inconvenience, and consists therein, that the required duantit'y of carbonic acid is introduced by means of a valve adapted to open and "close-automatically.

' The invention is illustrated in the accompanying drawing which shows Figure '1 "3o schematically an apparatus *formanufacturing refreshing drinks andin Figure 2 a longitudinal section of a'va lve constructed according to thein'vention. V Referring particularly to Figure 1 -in carrymg the'inventioninto effect the valve casing Vfat A is connected to the carbonic acid valve N'o'i a gas-accumulator O,-situated -on a commonsocket S of theapparatus. Thevalve'V is"adaptedto allow"theintermittent passage :49 of a predetermined quantity of carbonic acid when brought in use by opening the valve N. The manner in which this action of valve V is obtained will be more clearly'described in connection with Figure 2. The out-put end H of 4- 5 is contained. By means of a piston T, operated by a lever U, the bottle is pressed against a packing X in the lower part of the casing of the escape valve R, thus preventing leakage of gas through other parts than the valve R. The

5 escape valve R comprises a valve body Y,

pressed against its valve seat by means of the spring Z;

This device operates in the following manner:

The bottle is to be placed on the'piston T as shown in Figure 1 and pressed upwardsby means of the lever U. A't the same time valve N will be opened. Now valve V will operate to bring a' series of small quantitiesof carbonic acid to enter through pipe P- the refreshing drink iii-the bottle, wherein the carbonic acid dissolves. Meantime, the gas pressure will rise, and when it is'high enough the valve body Y-will'rise from its valve seat, thus causing the excess carbonic acid to escape.

When the valve N again is closed, one may take out'th'e bottle with its' carbonate drink to be used.

The'valveV is shown in detail inFigure 2, to which reference is now made.

Through a channel B the carbonic acid flows to a chamber C Within the valve casing V, the volume of which chamber is determined in accordance with the quantity of carbonic acid to be discharged intermittently to the liquid receiver. D indicates the valve seat of the piston-like valve body E, movable in the cylindrical chamber M in the valve'casing V. The said valve body E is kept pressed towards the valve seat D by means of a spring F against the action of the pressure in thechamberCQ The chamber Kben'eath the valve body Ecommunicates by means ofchannel Gwith the chamber Hada'pted to be connected up to the'liq'uid recei'ver' -and communicates'with the upper side of the valve body Ethrough' the channel I; and the chamber K also communicates with the chamber C by means of the opening L.

When the device is in use, carbonic 'acidfi'ows through-A and B to the chamber C; in "whichthe pressure is gradually raised until the pressure on that part of the underside of the valve body, which is acted on by the gas pressure through the port L exceeds the pressure of the spring F and of the gas in the chamber H upon the upper side of the valve body. The valve body will then be raised and gas will flow through the port L into the chamber K. In this manner expansion of the gas will take place but the decrease in gas pressure caused thereby will not allow the valve body E to approach the valve seat again, because the gas pressure will now act, not only on the small area of the valve body E exposed by the port L, but on the whole of the underside of this body. Conse- V quently, the total gas pressure On the underside of the valve body will be substantially greater than the pressure exerted by the spring F.

Meanwhile, gas will leak gradually through the passage G, into the chamber H and, from this chamber, through the passage I, to the chamber M, thus giving rise to an opposing pressure, which assists the pressure of the spring F. When this opposing pressure has increased to a predetermined degree, the valve body E.

will move back on to its seat and cover the valve port L. The pressure in the chamber C will then rise again but this, at first, will have no effect because this pressure acts on such a small area of the underside of the valve body E. Only when a considerable decrease in pressure in the chambers K, H and M has ensued can the valve E open again. This automatic opening and closing action will continue to repeat itself for an indefinite period.

The volume of the chamber C determines the quantity of gas admitted to the liquid contain ing reservoir at every impulse and the resistance to the flow of the gas in the passages B and G determines the velocity of periodicity of impulsing.

It is obvious, that the constricted gas passages B and G need not necessarily be constituted by ducts or channels as shown in the drawing, but can be formed by leakage paths of any convenient kind. Thus the construction G for instance, can be replaced by or can co-operate with the leakage path around the valve body E.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A self-acting valve comprising means arranged to open under the influence of the pressure of the entering gas on one side thereof and to intermittently pass a predetermined quantity of said gas from such side, through a constriction, to the other side of said valve thus causing the pressure of the gas on the last named side to bring the valve back to its closed position after a time interval essentially determined by the resistance opposed to the flow of the gas by the said constriction, a chamber on the first named side of the valve body, the inlet to this chamber being constituted by a second constriction or leakage path.

2. A self-acting valve comprising a valve body, one side of which constitutes part of the walls between one chamber and a second chamber the part of the walls turned to the first named chamber being arranged to close or open the inlet to said first named chamber and having an area substantially greater than the area of the inlet, said inlet constituting the outlet to a third chamber for determining quantity of gas delivered at each impulse, the inlet to this third chamber being constituted by a second constriction.

3. A self-acting valve comprising a valve body, one side of which constitutes part of the walls of a chamber, this part of the walls being arranged to closeor open the inlet to said chamber and having an area'substantially' greater than the area of the inlet, said inlet constituting the outlet to another chamber for determining quantity of gas delivered at each impulse, the inlet to this second chamber being constituted by a second constriction, a spring acting upon said valve body in such a manner that it opens only when the difference in pressure between the top side of the valve body and the part of the underside which is exposed by the valve opening preponderates over the pressure exerted by the said spring.

4. A self-acting valve comprising a movable valve body arranged to open a passage under the influence of the pressure of the entering gas on one side thereof and to intermittently pass a predetermined quantity of said gas from such side, through said passage and a constriction, or leakage path, to the other side of the movable valve body, one side of which constitutes part of the walls of a chamber, this part of the walls being arranged to close or open the inlet to said chamber and having an area substantially greater than the area of the inlet, said inlet constituting the outlet to another chamber for determining the quantity of gas delivered at each impulse, the inlet to this second chamber being constituted by a second constriction, a spring acting upon said valve body in such a manner that it opens only when the difference in pressure between the top side of the valve body and the part of the underside which is exposed by the valve opening preponderates over the pressure exerted by the said spring.

5. A self-acting valve comprising a movable valve body arranged to open a passage under the influence of the pressure of the entering gas on one side thereof and to intermittently pass a predetermined quantity of said gas from such side, through said passage and a constriction, or leakage path, to the other side of the movable valve body, one side of which constitutes part of the walls of a chamber, this part of the walls being arranged to close or open the inlet to said chamber and having an area substantially greater than the area of the inlet, said inlet constituting theoutlet to another chamber for determining the quantity of gas delivered at each impulse, the inlet to this second chamber being constituted .bya second constriction.

SVEN AUGUST ESKILSON. 

